Sir Lucius O'Brien, 3rd Baronet

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Sir Lucius O'Brien, 3rd Baronet Sir Lucius O'Brien, 3rd Baronet.jpg
Sir Lucius O'Brien, 3rd Baronet
Ann French, wife of Sir Lucius O'Brien, 3rd Baronet. Ann French.jpg
Ann French, wife of Sir Lucius O'Brien, 3rd Baronet.

Sir Lucius Henry O'Brien, 3rd Baronet PC (Ire) (2 September 1731 – 15 January 1795) was an Irish baronet and politician for 34 years.


He was a man of quite different parts to his father, an intellectual, a Greek and Latin scholar and a brilliant politician. He entered S.C. at Trinity College, Dublin, on 9th. July 1748, at the age of sixteen. He became a B.A. Vernon in 1752. Joined the Irish bar in 1758, and succeeded his father, as 3rd. Baronet of Dromoland, becoming a Privy councillor and M.P. [1]


O'Brien was the son of Sir Edward O'Brien, 2nd Baronet and his wife Mary Hickman, inheriting the baronetcy on the death of his father in 1765. He was educated at Trinity College, Dublin and entered the Middle Temple in 1753, later becoming a barrister. [2]


In 1761, he entered the Irish House of Commons as the member for Ennis, sitting until 1768. [3] Subsequently O'Brien successfully ran for Clare, a seat previously held by his father, holding it until 1776. [4] He was then again elected for Ennis, but following the unseating of Hugh Dillon Massy as Member of Parliament for Clare, O'Brien returned to represent that constituency in 1778. In the election of 1783, he became the representative for Tuam. O'Brien was sworn of the Privy Council of Ireland in 1786. [4] He served for the latter constituency until 1790, when he was re-elected for Ennis. He held this seat finally until his death in 1795. [3]

He was elected a Fellow of the Royal Society in 1773. [2]

In 1787 he was appointed a Privy Counsellor and from 1788 to 1795 was Clerk of the Crown and Hanaper in the Irish Chancery. [5]


O'Brien married Anne French, the daughter of Robert French, in 1768 and had by her seven children, three sons and four daughters. He was succeeded in the baronetcy as well as in the constituency of Ennis by his oldest son Edward.

His grandson James FitzGerald (1818–1896) was a prominent politician in New Zealand. [6]

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  1. O'Brien, Donough (1949). History of the O'Briens from Brian Boroimhe, AD. 1000 to AD. 1945. Batsford. p. 215. Retrieved 11 October 2021.]
  2. 1 2 "Fellow Details". Royal Society. Retrieved 27 January 2017.
  3. 1 2 "Irish House of Commons 1692–1800". Leigh Rayment. Archived from the original on 7 June 2008. Retrieved 27 August 2009.{{cite web}}: CS1 maint: unfit URL (link)
  4. 1 2 Lee, Sidney, ed. (1895). "O'Brien, Lucius Henry"  . Dictionary of National Biography . Vol. 41. London: Smith, Elder & Co. pp. 318–319.
  5. Hutchinson, John. A Catalogue of Notable Middle Templars: With Brief Biographical Notices. p. 178.
  6. "Fitzgerald, James Edward (FTST837JE)". A Cambridge Alumni Database. University of Cambridge.
Parliament of Ireland
Preceded by Member of Parliament for Ennis
With: Thomas Burton
Succeeded by
Preceded by Member of Parliament for Clare
With: Francis Pierpoint Burton
Succeeded by
Preceded by Member of Parliament for Ennis
With: William Burton
Succeeded by
Preceded by Member of Parliament for Clare
With: Edward FitzGerald
Succeeded by
Preceded by Member of Parliament for Tuam
With: Robert Day
Succeeded by
Preceded by Member of Parliament for Ennis
With: William Burton Conyngham
Succeeded by
Baronetage of Ireland
Preceded by Baronet
(of Leaghmenagh)
Succeeded by